A spectroscopic prism device for generating non-interference reference light

Abstract

The present invention discloses a beam splitter prism device for generation of non-interference reference light. The left side surface of the beam splitter prism is a plane of incidence, and the right side surface of the beam splitter prism is a detection surface, wherein there is a first inclined plane arranged between the upper side surface of the plane of incidence and the detection surface and there is a second inclined plane arranged between the lower side surface of the beam splitter prism and the plane of incidence; and a first included angle is arranged between the first inclined plane and the upper side surface of the beam splitter prism, and a second included angle is arranged between the second inclined plane and the plane of incidence. The beam splitter prism device for generation of non-interference reference light avoid the multiple reflection superposition of light beams outputted by a common beam splitters, and improve the stability o the light source power detection when the optical wavelength is changed caused by temperature changing.

Description

technical field [0001] The invention relates to the field of environmental monitoring, in particular to a spectroscopic prism device for generating non-interfering reference light. Background technique [0002] The particle concentration monitor is an essential instrument in environmental monitoring, which can provide fast, reliable and accurate quantitative smoke and dust emission data to the environmental supervision department. According to the technical requirements HJ / T 75-2007 and HJ / T 76-2007 of the environmental protection department, in order to ensure the accuracy of the monitoring instrument itself, it is necessary to calibrate the instrument. The existing particle concentration monitor calibration device uses a parallel beam splitter, which often causes interference during calibration. Because the ambient temperature range of the instrument is large (-20°C to +50°C), the laser wavelength changes with temperature. If the beam splitter If interference light is gen...

AI Technical Summary

Problems solved by technology

The existing particle concentration monitor calibration device uses a parallel beam splitter, which often causes interference during calibration. Because the ambient temperature range of the instrument is large (-20°C to +50°C), the laser wavelength changes with temperature. If the beam splitter If interference light is generated, it will be difficult for the stability of instrument detection to meet the design requirements

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